Unsafe Food Can Turn Trip Into Ordeal SHELDON MARGEN and DALE A. OGAR, Dr. Sheldon Margen is professor of public health at UC Berkeley; Dale A. Ogar is managing editor of the UC Berkeley Wellness Letter. They are the authors of several books, including "The Wellness Encyclopedia of Food and Nutrition."

Just Where Will L.A.'s Sick Go? ROBERT E. TRANQUADA, Robert E. Tranquada, a professor emeritus of medicine and public policy at USC, is a former chair of the L.A. County Health Access Task Force

Multiculturalists Are People, Too ISABELLE R. GUNNING and GARY PHILLIPS, Isabelle R. Gunning is a professor of law at Southwestern Law School. Gary Phillips was political director of Madison T. Shockley's unsuccessful campaign for the Los Angeles City Council in the 10th District

Get Ready for More Targeting Disasters PATRICK G. EDDINGTON, Patrick G. Eddington, a military analyst with the Central Intelligence Agency from 1988 to 1996, is author of "Gassed in the Gulf: The Insider's Story of the Pentagon/CIA Coverup of Gulf War Syndrome" (Insignia, 1997)